| All Patents in class 192/21 |
Patents 16 -
30
of 34
      |
| Number | Date | Patentee | Title | Type |
| 1,506,367 | Aug. 26, 1924 | G.W. Emrick | Tapping attachment | tapping heads and chucks |
| 1,510,623 | Oct. 07, 1924 | D.C. Klausmeyer | Friction Reverser | metalworking power transmission |
| 1,519,316 | Dec. 16, 1924 | J.E. Larsh | Device for imparting rotary motion | tapping machines |
| 1,598,581 | Aug. 31, 1926 | J.C. Carlton | Clutch and Brake Mechanism for Reversing Gearing | radial drill presses |
| 1,625,397 | Apr. 19, 1927 | A.E. Robinson | Friction Clutch Mechanism | metalworking machine clutches |
| 1,659,304 | Feb. 14, 1928 | R.L. Rickwood, O.E. Schauer | Split Sleeve Frictional Reverser | metalworking power transmission |
| 1,683,528 | Sep. 04, 1928 | J.C. Carlton | Clutch Mechanism for Reversing Gear | radial drill presses |
| 1,743,460 | Jan. 14, 1930 | T.L. Gibson, D.C. Klausmeyer | Driving Mechanism | metalworking power transmission |
| 1,753,085 | Apr. 01, 1930 | J.L. Peterson | Clutch | drill presses |
| 1,855,882 | Apr. 26, 1932 | R.L. Williamson, W.G. Hoelscher | Reversing Gear and Clutch Mechanism | metalworking speed changing mechanisms |
| 1,971,955 | Aug. 28, 1934 | W.G. Hoelscher | Reversing Gear and Clutch Mechanism | metalworking power transmission |
| 1,988,967 | Jan. 22, 1935 | G.W. Emrick | Clutch device | tapping heads and chucks |
| 2,006,913 | Jul. 02, 1935 | K.H. Conley | Clutch Throwing Mechanism | |
| 2,012,340 | Aug. 27, 1935 | G.W. Emrick | Tapping attachment | tapping heads and chucks |
| 2,162,250 | Jun. 13, 1939 | G.W. Emrick | Clutch mechanism for tapping attachments | tapping heads and chucks |
